Improvement in grates



G. B. MERSHON. Grate.

N PETERS. FNOTO-UTHQGRAPHER, WASHINGTON. D C.

vGEORGE n. MEHSHON, or PHILADELPHIA, PENNSYLVANIA, ASSIeNoE or ONE-HALE HIS EIGHT To ALBERT H. MEEsHoN, or SAME PLAGE.

IMPROVEMENT IN GRATES.

Specilication forming part of Letters Patent No. 2i3,.!28, dated March 11, 1879; application filed November (i, 1878.

To all whom it may concern:

Be it known that I, GEORGE B. MERSHON, of the city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Grates, which improvement is fully set forth in the following specification and accompanying drawings, in whichf Figure l is a top or plan view of the grate embodying my invention. Fig. 2fis a bottom view thereof. Fig. 3 is a central vertical seotion thereof. Fig. et is a front view thereof. Fig. 5 is a transverse section of one of the bars.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists of a rotary gratebar formed of 'two solid Side walls or webs separated by a slot or channel ruiming lengthwise and connected by bridges, whereby the bar is light, strong, and durable, and air is freely.

admitted through the Same without depriving the fire of its proper support, the slot permitting the application of a poker throughout its length to clear the bar when clogged. llhe several bars have studs projecting laterally from the upper ends of the webs, and alternating in adjacent bars for presenting a broad surface for properly supporting the fire, and likewise increasing the raking action.

It also consists of a dropping-bar provided with a chain or connection leading through the frontplate above the grate for conveniently restoring Said bar to its operative position from the front of the furnace, said connection having a covering, whereby it is prevented from being clogged by ashes, &c.

It also consists of the combination, with the rocking grate-bars, of rotary shafts detachably connected thereto and xed to the bedplate, as hereinafter set forth.

It also consists in providing the raking or p shaking mechanism with a swiveled eye,

whereby the lever thereof may be operated with greatest freedom.

Referring to the drawings, A represents the bed-plate, on which are supported the gratebars B B', the central one, B, of which is mounted at its rear end on a swin gin g han ger, C, Supported on the bed-plate, and formed at its front end with an angular projection, a, adapted to enter abearing, D, which has horizontal Sliding motions on a hanger, b, on the under Side of the bedplate, and on the front rest-plate, d, whereby 'said bearin g may b'e either engaged with or disengaged from said central bar, B, for the purpose of either holding or lowering the same.

To the projection a, there is secured a chain, E, which is passed through an opening,-c, in the bed-plate, and through a guide or tubular covering, F, which, rising angularly from a face-plate, A', communicates with an opening in the front rest-plate, d, the chain extending through said opening, so as to be conveniently accessible in front `of the furnace.

The bars B' are supported at the rear on the bed-plate or hanger thereon, and formed in front with angularopenings, through which are passed shafts G, which are journaled in the front rest-plate, d, and han gers f on the under side of the bed-plate.

To the front ends of the shafts Gr there are connected arms H, to whose upper ends is pivoted a horizontal bar, J, occupying a posi tion in front of the rest-plate d, and at the central portion of said bar is a swiveled eye, K, which coincides with an eye, g, on'the front portion of the sliding bearing D, a lever, L, being adapted to enter said eyes Kg, as most clearly shown in Figs. 3 and 4.

The operation is as follows: By operating the lever Lroclring motions are simultaneously imparted to the bars B B to the desired eX= tent for properly raking the fire.

When the fire or ashes are to be let down the leverLis removed and the bearingD drawn out. The central bar losing its support at the front end falls, turning on the hanger C as an axis, and leaves a space through which the fire v or ashes may descend, the operation being as= sisted by rotating the other bars.

In order to restore the central bar the chain Eis raised, thus elevating the bar to a line with the bearing D, and the bearing D forced in, so that the front end of the bar and the bearing engage, whereby the bar is again properly supported.

It will be Seen that the chainE iS operative from the front of the rest-plate, and passing through the tubular guide Fis covered and prevented from being clogged, Src.

When the bars are worn ont they may be removed and replaced by first displacing the face-plate A', the central bar being detach-v able from the bearing D in front and supported loosely on the hanger C at the rear, as has been stated.

.By raising the bars B B at the rear the front ends of the same are readily disengaged from the shafts G, whereby said bars may be easily removed from the bed-plate and afterward restored or replaced, as is evident, the shafts G G remaining, as it were, fixtures of the bedplate, as they are not materially affected by the fire. The swiveled eye K readily rotates oii the bar J and coincides with the motions of the eye g, whereby the lever L operates with ease and freedom and withoutI the binding of any of the parts. Each bar is formed of two solid walls or webs, a', between which is a slot or channel, a, extending continuous throughout the length thereof, and united at top at intervals by bridges a, which leave openings communicating with said slot a, or, in other words, the crown of the bar is perforated. Studs am project from the upper end of the side walls, a', whereby the bars present a broad surface for properly supp0rting the iire, and, owing' to the long slots a, sufficient airis admitted to the openings at J[op between the bridges, and the bars are in a measure kept cool. Moreover, the solid walls and top bridges present somewhat of an archshaped structure, which is strong and durable,

and the bars are considerably lightened, while, however, preserving the solidity ot' the walls a', the slot a also permitting the bars to clear themselves of ashes, Src., from below;`

and when the ashes or cinders do not disengage themselves the entire length of the slot' or channel is available for the insertion and powerful operation of a poker. v

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The rotatable grate-bar consisting ofthe perforated crown a, two solid side webs, a', the studs cd, projecting laterally from said webs and rotary end supports, substantially the central grate-bar, substantially as and forv the purpose set forth.

GEORGE B. MERSHON.

Witnesses:

ELLwoon BoNsALL, TVILLIAM T. GABELL. 

